Aguila is on my 'very questionable' list. 2 years ago I was shooting the M1 Carbine match at Perry. Using issued ammo - Aguila. About halfway thorough a round many a funny sounding pop and peppered my face with blowback. What the? Didn't extract either. Stopped and pulled the case out. Hmmm, bullet still in place, primer struck and obviously went off and mostly missing. Pried out the remnants and looked underneath.. No flash hole!
Wow, that's weird, oh well, try again. Had another 15 or so rounds later. Yeah, okay, I'm done.